Fix readme link to FixingBugs wiki page
Fix readme link to FixingBugs wiki page

Reviewers: austin, bgamari

Reviewed By: bgamari

Subscribers: thomie

Differential Revision: https://phabricator.haskell.org/D1988

(cherry picked from commit 90b8af05660dc2b36c62a07ff86703cbb9e04766)

GaloisInc/halvm-ghc,GaloisInc/halvm-ghc,GaloisInc/halvm-ghc,GaloisInc/halvm-ghc,GaloisInc/halvm-ghc,GaloisInc/halvm-ghc,GaloisInc/halvm-ghc